Superconducting magnets have important practical effects and huge application prospects in the fields of electrical engineering, transportation, medical treatment, military industry and scientific experiments, and some of them have achieved practical benefits. For example, magnetic resonance imaging equipment using superconducting magnets has become one of the most popular clinical diagnostic equipment in hospitals, and thousands of magnetic resonance imaging equipment are used in hospitals around the world. In addition, scientific instruments such as superconducting NMR spectrometers have also become commercial products and are widely used.